Abstract
Current sensing is a critical need for detecting system short circuit, thermal management, load balancing, and maximum power point tracking (MPPT) in DC-DC converters. An ultra low-power current sensing and digitization circuit based on a Current-to-Digital Conversion (IDC) technique is presented. The circuit is based digitizing the discharge period of a sampled capacitor without the need for an ADC. Relative to sensing methods based on series resistors and analog-to-digital converters to digitize the sampled current, the proposed circuit achieves higher accuracy with less complexity, and occupies a fraction of the area, and power consumption. The circuit is designed using a 100V compliant 0.35μm CMOS technology for a 60V boost DC-DC converter. For load current ranging from around 0.1 to 1A, the proposed sensor total power consumption is less than 0.57 nano-W and less than 1% measurement error.
| Original language | English (US) |
|---|---|
| Title of host publication | PRIME 2012; 8th Conference on Ph.D. Research in Microelectronics and Electronics |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 329-332 |
| Number of pages | 4 |
| ISBN (Electronic) | 9783800734429 |
| State | Published - 2012 |
| Event | 8th Conference on Ph.D. Research in Microelectronics and Electronics, PRIME 2012 - Aachen, Germany Duration: Jun 12 2012 → Jun 15 2012 |
Other
| Other | 8th Conference on Ph.D. Research in Microelectronics and Electronics, PRIME 2012 |
|---|---|
| Country/Territory | Germany |
| City | Aachen |
| Period | 6/12/12 → 6/15/12 |
Keywords
- Capacitor
- Current-to-Digital Conversion
- Switching converters
ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering
- Instrumentation